> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mobula.io/llms.txt
> Use this file to discover all available pages before exploring further.

# ✨ May 30, 2026 - Solana Minimum Fees: native-SOL floor & flat token fees

> minFeesNative is now enforced on-chain for Solana swaps, plus new feeToken/minFeesTokenRaw params for a flat minimum fee in any SPL token.

**TL;DR**: `minFeesNative` now works on Solana — it floors the caller referral fee in SOL and is enforced on-chain by MobulaRouter. Two new params, `feeToken` + `minFeesTokenRaw`, let you charge a flat minimum fee in any SPL token, independent of the swap route.

## minFeesNative on Solana

`minFeesNative` sets a floor on the caller referral fee, previously honored only on TON. It now also applies to Solana swaps where the fee asset is native SOL (i.e. the quote side of the pair is SOL).

* Effective referral fee = `max(amountIn × feePercentage / 100, minFeesNative)`
* Enforced **on-chain** by MobulaRouter — not just computed off-chain
* Honored when the fee is taken in native SOL; ignored for SPL-token fees
* Requires `feeWallet`

```bash theme={null}
curl -X GET "https://api.mobula.io/api/2/swap/quoting?chainId=solana&tokenIn=So11111111111111111111111111111111111111111&tokenOut=MemeTokenAddress&amount=1&walletAddress=YourWalletAddress&feePercentage=0.1&feeWallet=YourFeeWallet&minFeesNative=0.03"
```

## feeToken & minFeesTokenRaw (Solana)

Charge a flat **minimum** fee in any SPL token, regardless of what is being swapped.

* `feeToken` — mint of the token to charge in
* `minFeesTokenRaw` — raw amount (smallest unit) to charge
* Collected via a dedicated instruction added next to the swap, transferred to `feeWallet`
* **Independent of the swap route** — the fee token does not need to be `tokenIn` or `tokenOut`
* The transaction reverts if the user's balance is insufficient
* Requires `feeWallet`

Example — charge at least 1 USDC per swap, regardless of size or pair:

```bash theme={null}
curl -X GET "https://api.mobula.io/api/2/swap/quoting?chainId=solana&tokenIn=So11111111111111111111111111111111111111111&tokenOut=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v&amount=1&walletAddress=YourWalletAddress&feeWallet=YourFeeWallet&feeToken=EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v&minFeesTokenRaw=1000000"
```